I've had these and used the good one for many years. I picked up the parts unit thinking I would get around to fixing it. I won't.
One works and the other is for parts or repair. The meter on the right in the photos works one on the left is for parts.
The good: it works
the bad: the switch is a bit sticky but very functional, a baffle(?) is visible in the viewfinder but doesn't affect function. ALSO, it reads about one stop off, I believe it's because of the batteries I have in it being higher voltage than the original mercury cells. Marked for zone system.
The unit for parts/repair is in better condition (kinda) save for the battery compartment, it's missing parts. A handy person could easily make one really nice meter with this.